added basic slide thumbnails and selection control

src/ui/src/assets/css/_slidesList.scss

@@ -1,5 +1,20 @@
 .slides-list {
 	//background: #222;
-	background: color(lighterBackground);
+	background: color(sidebarBackground);
 	overflow-y: auto;
+
+	.slide-wrap {
+		width: 100%;
+		aspect-ratio: 1.333;
+		overflow: hidden;
+		margin-bottom: 0.1rem;
+	}
+
+	.slide {
+		width: 100vw;
+		height: auto;
+		margin: 5% 0 0 5%;
+		aspect-ratio: 1.333;
+		-webkit-transform-origin: top left;
+	}
 }